Baltimore isn't as good on defense as it has been in years past, due in part to injuries. The Ravens have struggled against the run, with four opponents having rushed for at least 170 yards. The Ravens allowed at least 180 yards rushing in three consecutive games. Opponents are averaging at least 4.2 yards per carry against Baltimore in every gap to the offensive left. Edge: Broncos.

When the Ravens run

Denver also has had trouble stopping the run. The Ravens can line up with two tight ends or two backs — and still get the Broncos into the nickel package. The Patriots had the most success with 140 of their 251 yards rushing coming against Denver's nickel in an Oct. 7 game against the Broncos. The Ravens sometimes take tight end Dennis Pitta out of the lineup when they are looking to run the ball. But they will challenge the Denver defense with Ray Rice all over their formation. Edge: Ravens.

For many quarterbacks playing against the Ravens, it's difficult to find the right receiver — especially in the red zone. The Redskins attacked the Ravens' nickel package last weekend. Baltimore gives veteran safety Ed Reed the freedom to make plays on the ball. And the Ravens have consistently played good defense in the red zone. They rank 10th in the 32-team NFL in scoring defense. Edge: Broncos.

When the Ravens pass

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Joe Flacco has thrown for fewer than 200 yards in three of the Ravens' last four games. But with Jim Caldwell's sudden promotion to offensive coordinator, the Ravens are expected to pick up the pace on offense. Flacco isn't always patient, and the Denver defense should know that he's going to throw the ball deep to Torrey Smith early if he thinks there is a play to be made. When the Ravens use Pitta and Rice in the passing game together, that could be a matchup problem for the Broncos' linebackers. Edge: Broncos.

Special teams

This will be a battle between two of the NFL's best units. Ravens coach John Harbaugh was a longtime special-teams assistant in the league, and his teams are known for being opportunistic and fundamentally sound in this area. Look for Harbaugh to throw the Broncos a curveball during Sunday's game. Any turnover in this area could tip what figures to be a close game. Edge: Ravens.

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